Chief Justice John Roberts Dumps Microsoft Stock

President Obama Delivers State of The Union Address
Supreme Court Chief Justice John Roberts arrives to listen to U.S. President Barack Obama, not pictured, deliver the State of the Union address to a joint session of Congress at the Capitol in Washington, D.C., U.S., on Tuesday, Jan. 28, 2014. Obama offered modest steps to chip away at the country's economic and social challenges in a State of the Union address that reflects the limits of his power to sway Congress. Photographer: Andrew Harrer/Bloomberg via Getty Images
Photograph by Andrew Harrer — Bloomberg Bloomberg via Getty Images

U.S. Supreme Court Chief Justice John Roberts has sold off somewhere between $250,000 and $500,000 worth of Microsoft (MSFT) stock in before the court is slated to hear a case involving the software giant, according to the Associated Press.

Federal judges are supposed to recuse themselves from cases involving companies they have an interest in and, but there are lapses. In October Chief Justice Roberts took part in a deposition involving Texas Instruments (TXN). But financial disclosure forms from the previous year showed that he or a family member owned shares in the company. When the issue was raised, the court’s spokeswoman attributed the issue to human error.

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These incidents have caused some organizations, including grassroots watchdog “Fix the Court,” to call for court reform to eliminate conflicts and increase transparency.

Last week, the Supreme Court said it would take on a case about whether a class action suit alleging defects in Microsoft’s Xbox gaming console can go forward.

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Fortune reached out to the Supreme Court’s spokeswoman for comment and will update this story as needed.

In October there was a kerfuffle when Justice Stephen Breyer sat on a case involving Johnson Controls (JCI), despite his wife’s ownership of shares that company. She ended up selling those shares.

Justice Samuel Alito, who also owned shares in that company, sat out the case, according to the AP report which also noted that three of the nine justices, Roberts, Alito and Breyer, own individual stocks.

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